CN209961555U - Be suitable for gaseous quick sampling device of cohesive soil - Google Patents
Be suitable for gaseous quick sampling device of cohesive soil Download PDFInfo
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- CN209961555U CN209961555U CN201920359273.3U CN201920359273U CN209961555U CN 209961555 U CN209961555 U CN 209961555U CN 201920359273 U CN201920359273 U CN 201920359273U CN 209961555 U CN209961555 U CN 209961555U
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Abstract
The utility model relates to a be suitable for gaseous quick sampling device of cohesive soil belongs to gaseous collection system technical field. The device comprises a soil cover, wherein the soil cover is a cover body with an opening at the lower part and a certain volume, a plurality of gas circulation holes and a wire through hole are formed in the upper part of the soil cover, and the soil cover is inserted into a soil layer and is used for collecting gas in the soil cover with a certain volume; a heating rod is arranged in the soil cover, the heating rod is inserted into the soil layer along with the soil cover, and the heating rod is used for heating the soil with a certain amount in the soil cover to volatilize gas in the soil; a hollow connecting pipe is connected to the upper portion of the soil cover, a gas outlet is formed in the connecting pipe and connected with a gas sampling pump, and the gas sampling pump is used for collecting gas in soil. The utility model discloses the device can carry out quick gaseous sample to quantitative soil to can carry out quantitative determination to collecting gas, be suitable for the gaseous sample detection in the cohesive soil.
Description
Technical Field
The utility model relates to a gaseous sampling device especially relates to a be suitable for gaseous quick sampling device of cohesive soil.
Background
Soil gas contaminated by non-aqueous phase liquids (NAPLs) is present in the pore spaces of the soil, and the soil gas is composed of products of direct evaporation of the contaminants or metabolic conversion of the contaminants, and the composition and concentration of the soil gas directly indicate the contaminated soil and the degree of contamination.
The existing soil gas collection method is divided into an active soil gas collection method and a passive soil gas collection method, wherein the active soil gas collection method is characterized in that a gas sampling device, usually a pipe, is directly inserted into soil or a borehole constructed in advance, the front end of the pipe is mostly provided with a porous pottery clay head, and the pipe or the pottery clay head is placed into the soil in advance and then is applied with negative pressure through a pipeline to lead out gas for sampling; the latter is a sampling in which soil gas adsorption is performed by an adsorbent placed in soil without applying negative pressure.
The above method is only suitable for collecting gas from porous aeration zone soil, and is difficult to be used for collecting gas from viscous soil, and the gas collection time in the above method is long, so that the volume amount and concentration of the collected gas in unit volume of soil cannot be quantified. In order to rapidly acquire whether the viscous soil is polluted by NAPLs substances and quantitatively characterize the pollution degree of the NAPLs substances, technical improvements in the aspects of acquiring and collecting gas of the viscous soil are needed.
Disclosure of Invention
In view of this, the utility model provides a device of quick gaseous sample is carried out quantitative cohesive soil to can carry out quantitative determination to the gas of collecting, be suitable for the gaseous sample detection among the cohesive soil.
The utility model provides a gas rapid sampling device suitable for cohesive soil, which comprises a soil cover, wherein the soil cover is a cover body with an opening at the lower part and a certain volume, a plurality of gas circulation holes and a wire through hole are arranged at the upper part of the soil cover, and the soil cover is inserted into a soil layer for collecting gas from soil with a certain volume in the soil cover; a heating rod is arranged in the soil cover, the heating rod is inserted into a soil layer along with the soil cover, and the heating rod is used for heating the soil with a fixed quantity in the soil cover so as to volatilize NAPLs of gas phase, free phase, adsorption phase and solution phase in the soil; a hollow connecting pipe is connected to the upper portion of the soil cover, a gas outlet is formed in the connecting pipe and connected with a gas sampling pump, and the gas sampling pump is used for collecting gas in soil.
Furthermore, the soil cover is a metal cover and is in the shape of a cylinder with an opening at the lower end.
Furthermore, a plurality of gas circulation holes are evenly distributed along the circumference of the upper part of the cylindrical metal cover, the electric wire through hole is positioned at the center of the circle of the upper part of the metal cover, the top of the heating rod is fixedly connected at the position of the electric wire through hole, an electric wire is connected with the heating rod through the electric wire through hole, the other end of the electric wire penetrates through the hollow connecting pipe and is led out of the connecting pipe from a small hole formed in the connecting pipe, and the connecting pipe is connected with a power supply. The power supply is switched on to heat the soil, and the temperature can reach 250 ℃.
Furthermore, the gas outlet is also connected with a gas detector, so that whether the soil is polluted or not and the pollutant category can be quickly discriminated.
Further, the gas detector is a VOC gas detector.
Furthermore, the other end of the connecting pipe, which is far away from the soil cover, is fixedly connected with a handle, the handle is perpendicular to the connecting pipe, and the handle is pushed to press the metal cover into the soil.
Compared with the prior art, the utility model provides a technical scheme brings following beneficial effect: the device of the utility model accelerates the release of the substances of the adsorption phase, the free phase and the dissolved phase among the particles on the cohesive soil layer particles through the heating process, and quickly collects NAPLs entering the cohesive soil layer; the device can be further connected with a rapid detector to rapidly discriminate whether the soil is polluted or not and the category of the pollutants; the utility model discloses a device is except can carrying out quick discernment to the pollutant in the normal position soil layer, carries out quick discernment to the same accessible the device of separation soil.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.
Fig. 1 is a schematic structural diagram of a gas rapid sampling device suitable for viscous soil according to an embodiment of the present invention;
FIG. 2 is a schematic view of the metal cap structure of FIG. 1;
fig. 3 is a schematic view of the upper portion of the metal cover of fig. 2.
Reference numerals:
11-a metal cover; 12-a heating rod; 13-gas flow holes; 14-a wire through hole; 21-connecting pipe; 22-gas exhaust port; 31-handle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Referring to fig. 1 to 3, an embodiment of the present invention provides a rapid gas sampling device for viscous soil, which includes a soil cover 11, the soil cover 11 is a cover body with a lower opening and a certain volume, the upper portion of the soil cover 11 is provided with a plurality of gas through holes 13 and a wire through hole 14, and the soil cover 11 is inserted into the soil layer for collecting the gas from the soil with a certain volume in the soil cover 11; a heating rod 12 is arranged in the soil cover 11, the heating rod 12 is inserted into the soil layer along with the soil cover 11, and the heating rod 11 is used for heating the soil with fixed quantity in the soil cover 11 so as to volatilize NAPLs of gas phase, free phase, adsorption phase and solution phase in the soil; the upper part of the soil cover 11 is connected with a hollow connecting pipe 21, a gas outlet 22 is arranged on the connecting pipe 21, and the gas outlet 22 is connected with a gas sampling pump (not shown in the figure) which is used for collecting gas in soil.
Specifically, the soil cover 11 is a metal cover in the shape of a cylinder with an open lower end. The gas circulation holes 13 are uniformly distributed along the circumference of the upper part of the cylindrical metal cover, the wire through hole 14 is positioned at the center of the upper part of the metal cover, the top of the heating rod 12 is fixedly connected at the wire through hole 14, a wire is connected with the heating rod 12 through the wire through hole 14, the other end of the wire penetrates through the hollow connecting pipe 21, the connecting pipe 21 is led out from a small hole formed in the connecting pipe 21, and the other end of the wire is connected with a power supply. The power is switched on to heat the soil body, and the temperature can reach 250 ℃.
The gas outlet 22 may also be connected directly to a gas detector (not shown), which may optionally be a VOC gas detector, for rapid screening of soil for contamination and contaminant type.
In one embodiment, a handle 31 is fixedly connected to the other end of the connecting pipe 21 away from the soil cover 11, the handle 31 is perpendicular to the connecting pipe 21, and the handle 31 is pushed to press the soil cover 11 into the soil.
When the device in the embodiment of the utility model is actually used for quickly sampling the gas of the viscous soil, the handle 31 is pushed to vertically insert the soil cover 11 into the soil layer; the gas outlet 22 is connected with a compressor, the compressor is started to evacuate residual air in the pipeline of the sampling device, the compressor is closed, the negative pressure in the pipeline is maintained, and then the gas outlet 22 is connected with a gas sampling pump, or the gas outlet 22 is directly connected with a VOC gas detector. After the power supply is switched on, the heating rod 12 heats the soil (the temperature can reach 250 ℃), so that gas phase, free phase, adsorption phase and solution phase in the soil are volatilized, and the gas is collected in a gas sampling pump or directly connected to a gas detector for detection.
In summary, the embodiment of the present invention provides a rapid sampling device for gas in cohesive soil, which accelerates the release of adsorbed phase, free phase and dissolved phase substances on particles of the cohesive soil layer through a heating process, and rapidly collects NAPLs entering the cohesive soil layer; the device can be further connected with a rapid detector to rapidly screen whether the soil is polluted or not and the type of the pollutant.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. A gas rapid sampling device suitable for cohesive soil is characterized by comprising a soil cover, wherein the soil cover is a cover body with an opening at the lower part and a certain volume, a plurality of gas circulation holes and a wire through hole are formed in the upper part of the soil cover, and the soil cover is inserted into a soil layer and is used for collecting gas in a certain volume of soil in the soil cover; a heating rod is arranged in the soil cover, the heating rod is inserted into the soil layer along with the soil cover, and the heating rod is used for heating the soil with a fixed amount in the soil cover to volatilize gas in the soil; a hollow connecting pipe is connected to the upper portion of the soil cover, a gas outlet is formed in the connecting pipe and connected with a gas sampling pump, and the gas sampling pump is used for collecting gas in soil.
2. The device for rapidly sampling gas suitable for cohesive soil according to claim 1, wherein the soil cover is a metal cover in the shape of a cylinder with an open lower end.
3. The device for rapidly sampling gas suitable for cohesive soil according to claim 2, wherein the plurality of gas through holes are uniformly distributed along the circumference of the upper part of the cylindrical metal cover, the wire through hole is positioned at the center of the upper part of the metal cover, the top of the heating rod is fixedly connected to the wire through hole, a wire is connected to the heating rod through the wire through hole, and the other end of the wire passes through the hollow connecting pipe and is led out of the connecting pipe from a small hole arranged on the connecting pipe to be connected with a power supply.
4. The gas rapid sampling device for the viscous soil according to claim 1, wherein the gas outlet is further connected with a gas detector, and the gas detector is used for rapidly screening the soil gas for pollution and pollutant types.
5. The device for rapidly sampling gas for sticky soil according to claim 4, wherein the gas detector is a VOC gas detector.
6. The device for rapidly sampling gas suitable for cohesive soil according to claim 1, wherein a handle is fixedly connected to the other end of the connecting pipe, which is far away from the metal cover, and the handle is arranged perpendicular to the connecting pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920359273.3U CN209961555U (en) | 2019-03-20 | 2019-03-20 | Be suitable for gaseous quick sampling device of cohesive soil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920359273.3U CN209961555U (en) | 2019-03-20 | 2019-03-20 | Be suitable for gaseous quick sampling device of cohesive soil |
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| CN209961555U true CN209961555U (en) | 2020-01-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109991045A (en) * | 2019-03-20 | 2019-07-09 | 中国地质大学（武汉） | A kind of gas rapid sampling attachment suitable for clayed soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109991045A (en) * | 2019-03-20 | 2019-07-09 | 中国地质大学（武汉） | A kind of gas rapid sampling attachment suitable for clayed soil |
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